تحلیل شاخص‌های جهانی محیطزیست با رویکرد توسعۀ پایدار شهر تهران

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

1 دانشیار گروه جغرافیا، دانشگاه شهید بهشتی تهران

2 دانشجوی دکتری جغرافیا و برنامه ریزی شهری، دانشگاه شهید بهشتی تهران

3 دانشیار دانشکدۀ علوم و فنون، دانشگاه تهران

چکیده

محیط‌زیست مقوله­ای مهم و مدنظر جامعۀ جهانی است که برگزاری جلسه‌های فراوان در سطوح بین‌المللی و منطقه‌ای نگرانی جامعۀ جهانی را دربارۀ آن بیان می­کند. هدف کلی پژوهش توصیفی-تحلیلی حاضر شناخت وضعیت مناطق تهران از نظر شاخص‌های محیطی است. بدین­منظور این شاخص‌ها با مشارکت کارشناسان امتیازدهی، و با تحلیل سلسله­مراتبی و نرم‌افزار Export Choice وزن‌دهی شدند. همچنین به­کمک روش‌های آماری به محاسبۀ این شاخص­ها پرداخته شد و ترسیم آن­ها در نرم‌افزار Arc Gis صورت گرفت. اطلاعات مورد نیاز پژوهش نیز با مصاحبه و استعلام از سازمان‌های مربوط به­دست آمد. نتایج پژوهش نشان می‌دهد امتیاز مناطق 22گانۀ شهری تهران براساس ارزیابی شاخص عملکرد محیطی، بین 2/49 تا 72 است. بدین­ترتیب 10 منطقۀ شهری تهران در پهنۀ مناسب و 12 منطقه در پهنۀ نسبتاً مناسب قرار گرفته‌اند. معضلات محیط‌زیستی شهر تهران به چهار بخش تقسیم می­شود: در بخش اول با مشکلات ناشی از موقعیت جغرافیایی شهر تهران مواجهیم که در آن ضعف‌هایی از قبیل شرایط ژئومورفولوژیکی خاص، اختلاف ارتفاع زیاد بین شمال و جنوب و کاهش جهت جریان هوا مشاهده می­شود. روند شهرنشینی شتابان و تغییرات فیزیکی-کالبدی، بخش دوم این مشکلات است. سومین بخش به نقش‌های اقتصادی-اجتماعی شهر تهران مربوط است که در آن تمرکز یافته‌اند. چهارمین بخش نیز به ساختار سازمانی و تشکیلاتی نامناسب برای مدیریت کلان‌شهری تهران مربوط است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Analysis of Global Environmental Indices by Urban Sustainable Development Approach

نویسندگان [English]

  • Jila Sajadi 1
  • Mohammad Sadegh Afrasiabirad 2
  • Jamileh Tavakolinia 1
  • Hossein Yousefi 3
1 Associate Professor of Geography and Urban Planning, Shahid Beheshti University, Iran
2 PhD Candidate in Geography and Urban Planning, Shahid Beheshti University, Iran
3 Associate Professor, Faculty of New Sciences and Technologies, University of Tehran, Iran
چکیده [English]

Introduction
The plenty of conferences and symposiums in international and regional levels about environment show the concerns of the world about the environmental issues. There are always mutual relations between human activities and natural processes. Population growth and technological advancement are increasing the requirements of human societies. The sustainable development can be a solution for the ongoing processes. Urban expansion and development of Tehran City resulted in great changes in urban environment. The purpose of this research is to assess the urban districts of Tehran in terms of environmental indices.
Methodology
This is a descriptive analytical research. Environmental experts participated to fill the questionnaires. Some other data have been gathered by some organizational data. The criteria have been weighted using questionnaires results through Analytical Hierarchy Process (AHP) in Expert Choice. The results have been analyzed by statistical tests using SPSS. The outputs have been entered into ArcGIS for further analysis. We have also carried out Environmental Performance Index for the 22 districts of Tehran.
Results and discussion
The Environmental Performance Index for the 22 districts of Tehran is ranged from 49.2 to 72. This has indicated 10 districts are categorized as suitable and 12 relatively suitable. The highest population density is in district 10 with 36716 people in km2and the lowest is 17 with 31102 people in km2.  The worst air quality is obtained in districts of 3, 7, 10, and 18 in an order. Other indices are waste water network conditions, public health, waste management, vegetation, built area, climate, and soil water conditions.  
Conclusion
The results have revealed that the southern areas of Tehran have more proper conditions compared with northern areas. it can be said that the most important problem of the city is air pollution. The environmental conditions of Tehran can be classified into four categories. The first category is related to the problems resulted from geographical location of the city. The location is influenced by geomorphological conditions such as great height difference from north to south and problems in weather issues. The second category of problems is related to rapid immigration to this city and physical expansion.  The third category is related to social and economic functions in the city. The fourth category of the environmental issues of Tehran is resulted from organizational and institutional structure and incompetent urban management. 

کلیدواژه‌ها [English]

  • TEHRAN
  • Environmental Performance Index
  • environment
  • Sustainable Development
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